Well, I've been riding on these Jalco AX-430 for about 5 months now. They were on my bike when I bought it but they do the trick. I'm riding mostly on forest trails, lots of roots, quick rocky trails and stuff like that. They definitelly aren't built to do dirt jumps or freeriding, but as cross-country material, why not. I'm changing them this week for Mavic Deetraks just because I have nothing to do with spare 300 bucks, otherwise I'd be riding with my jalco's until I don't know when...